What is the hybridization of $C r$ if $C O_{2}$ gas is passed into an aqueous chromate (VI) solution?

s p^{3}

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d^{3} s

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s p^{2}

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d s p^{2}

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Solution

The correct option is B $d^{3} s$
$2 K_{2} C r O_{4} + 2 C O_{2} \to K_{2} C r_{2} O_{7} + 2 K H C O_{3}$

The $C r$ atom in $K_{2} C r_{2} O_{7}$ is $d^{3} s$ hybridised and has a tetrahedral geometry.

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